perf: add page (#1556)

pages/linux/perf.md

@@ -0,0 +1,19 @@
+# perf
+
+> Framework for linux performance counter measurements.
+
+- Gather basic performance counter stats for a command:
+
+`perf stat {{command}}`
+
+- Display system-wide real time performance counter profile:
+
+`sudo perf top`
+
+- Run a command and record its profile into perf.data:
+
+`sudo perf record {{command}}`
+
+- Read perf.data (created by perf record) and display the profile:
+
+`sudo perf report`